Summary of Property Equipment and Software (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, equipment and software at cost	$ 7,199	$ 6,814
Less: accumulated depreciation	(3,392)	(2,930)
Property, equipment and software, net	3,807	3,884
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property, equipment and software at cost	3,651	3,517
Software
Property, Plant and Equipment [Line Items]
Property, equipment and software at cost	3,178	2,932
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, equipment and software at cost	$ 370	$ 365

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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